55915490 has 16 divisors (see below), whose sum is σ = 101044152. Its totient is φ = 22278144.

The previous prime is 55915487. The next prime is 55915501. The reversal of 55915490 is 9451955.

It can be written as a sum of positive squares in 4 ways, for example, as 55160329 + 755161 = 7427^2 + 869^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8309 + ... + 13448.

Almost surely, 2^55915490 is an apocalyptic number.

55915490 is a deficient number, since it is larger than the sum of its proper divisors (45128662).

55915490 is a wasteful number, since it uses less digits than its factorization.

55915490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22021.

The product of its (nonzero) digits is 40500, while the sum is 38.

The square root of 55915490 is about 7477.6660797337. Note that the first 3 decimals coincide. The cubic root of 55915490 is about 382.3936851209.

The spelling of 55915490 in words is "fifty-five million, nine hundred fifteen thousand, four hundred ninety".